What is the validity period of domestic explosion-proof certificates?

End users of explosion-proof electrical products often face such problems.

In fact, explosion-proof certificates have a validity period. Currently, the validity period of domestic explosion-proof certificates is generally5Year.

Each certificate holder will clearly see the validity period of the certificate on the certificate.

The explosion-proof certificate can be changed or further extended during its validity period.

Change of explosion-proof certificate

If there is an error in the content of the explosion-proof certificate, it should be changed in a timely manner. If there is a change in the address of the unit or a change in the name of the original manufacturing unit, the change procedures and application letter should be presented for the change.

Renewal of explosion-proof certificate

When the validity period of a company's explosion-proof certificate is about to expire, the company should provide an application letter for certificate renewal within three months before and after the validity period, and should bring the following information to apply for certificate renewal again. If there is any unexpected situation, please inform our center in a timely manner. The application letter includes the product name, model, original explosion-proof grade, original explosion-proof qualification certificate number, and an explanation of whether the product has been changed. Enterprises should also send expired explosion-proof certificates and technical materials that have been submitted for inspection toZhongnuo TestingReview again and provide samples for retesting.